CN2906705Y

CN2906705Y - Intelligent steam-injection boiler monitoring and control system

Info

Publication number: CN2906705Y
Application number: CN 200620001120
Authority: CN
Inventors: 宫卓立; 李如宏; 高波
Original assignee: 宫卓立; 李如宏
Current assignee: Beijing Hongrui Sega Technology Co. Ltd.
Priority date: 2006-01-16
Filing date: 2006-01-16
Publication date: 2007-05-30
Anticipated expiration: 2016-01-16

Abstract

The utility model relates to an intelligent steam-injected boiler monitoring system, which comprises a steam-injected boiler body(1), a water supply piston pump(2), a fuel pump(3), a blower(4), a burner(19), an air door baffle(33) and other main parts. The intelligent steam-injected boiler monitoring system is formed by centering upon a PLC(10), a touch screen(11), a printer(12) and a display(13), and is connected to a plurality of instrumentations arranged on a boiler(6,7,8,14,16,17,22,25,27), execution structures(15,21,28,32),and inverters(9,18,26) by shielded cables; the full automatic control within which the boiler stops operation when the ignition run alarm is started is realized; the steam quality measurement technology and the thermal efficiency calculation mathematical model realize on-line continuous automatic measurement of the steam quality and adjust the fire volume automatically to maintain the steam quality required by production; the flue gas analysis is conducted automatically and the air volume is controlled automatically to achieve optimal combustion, the water supply flow of the boiler, the atomization pressure, the fuel pressure, the fuel temperature are all adjusted automatically. When 24 alarms appear at the same time, the boiler automatically stops.

Description

Intelligent injection boiler supervisory system

Affiliated technical field the utility model relates to a kind of " intelligent injection boiler supervisory system " that is used on the oilfield exploitation thick oil filling boiler furnace, be applicable to injection boiler introduction, homemade, replace manually-operated, realize full-automatic control and management, improve and annotate the vapour quality and safety.

Background technology is present, external or the of home make injection boiler of a large amount of introductions that domestic each viscous crude field uses, it all is the technology in the external sixties, the operation control mode is to be main manually, steam quality is measured and is wanted artificial sample examination, the fire amount is also wanted artificial manual adjustments, is difficult to guarantee to annotate the vapour quality; The ratio of fuel and air does not have measuring instrument, can not reach best combustion, and the low waste of the thermal efficiency is big, and this kind operation control mode is abroad eliminated already.

The summary of the invention the purpose of this utility model is the deficiency at existing injection boiler operation control, a kind of " intelligent injection boiler supervisory system " is provided, realize automatic start-stop with Programmable Logic Controller (PLC) and touch-screen, automatically measure and the operational factor of controlling injection boiler automatically, make full use of the convenience of computing machine, fast, characteristic of accurate, add that the steam quality of oneself developing is measured and the thermal efficiency is measured the mathematical-specific model, constitute " intelligent injection boiler supervisory system ", improve the running quality of injection boiler, improve security, can improve crude production rate and can save the energy again, realize the safe operation of injection boiler high-quality, best combustion and purpose of energy saving.

The technical scheme that its technical matters that solves the utility model adopts is: setting pressure transmitter on injection boiler, flow transmitter, differential pressure transmitter, oil pressure transmitter, the atomizing pressure transmitter, the dryness measurement nozzle, the flue gas analysis detecting device, discharge is regulated frequency converter, air quantity is regulated frequency converter, the oil pump frequency converter, Programmable Logic Controller (PLC), touch-screen, at duty room a display and printer are set, be connected with the boiler Programmable Logic Controller with telecommunication cable, the measuring-signal that each transmitter produces during boiler operatiopn is connected with Programmable Logic Controller, after steam quality measurement and thermal efficiency measurement mathematical-specific models treated, deliver to touch-screen, display shows, the control signal that PLC produces is delivered to each frequency converter, actuator is controlled boiler start/ stop automatically, automatically measure the mass dryness fraction and the thermal efficiency, for example: mass dryness fraction exceeds deviation range, automatically increase and decrease fire amount keeps the mass dryness fraction that requires; Flue gas oxygen amount exceeds deviation, can regulate wind supply quantity automatically, keeps best combustion, and the reference record curve is arranged, and unusual as if having, parameter transfinites and can send alarm sound immediately, but the timed print production report reaches the purpose of stablizing mass dryness fraction and best combustion.

The beneficial effects of the utility model are: on-line automatic measurement steam quality is measured with regulating fire automatically, and the steam quality to keep requiring can improve crude production rate; On-line automaticly carry out flue gas analysis, regulate air quantity automatically, reach best combustion and purpose of energy saving, guarantee to annotate the vapour quality and improved production management level steadily, greatly according to flue gas oxygen content and excess air.

This Figure of description of description of drawings is a block diagram of forming " intelligent injection boiler supervisory system ", in the Figure of description: 1. injection boiler, 2. water supply ram pump, 3. fuel pump, 4. fan blower, 5. dryness measurement nozzle, 6. vapor pressure transmitter, 7. differential pressure transmitter, 8. water ga(u)ge, 9. make-up pump frequency converter, 10.PLC, 11. touch-screens, 12. printer, 13. displays, 14. vapor (steam) temperature transmitters, 15. the fire amount is regulated topworks, 16. flue gas analysis sensors, the warm galvanic couple of 17. cigarettes, 18. fan frequency converter, 19. burners, 20. permanent reducing transformers, 21. atomizing pressure is regulated and is cut down, 22. the atomizing pressure transmitter, 25. fuel pressure transmitters are cut down in 23. decompressions, 26. fuel pump frequency converter, 27. the fuel oil temperature transmitter, 28. fuel oil temperatures are regulated and are cut down 30. fuel heaters, 32. 33. air door baffle plates are cut down in amount of fuel control.Among the figure → outwards represent that the measuring instrument signal gives PLC, → inwardly represent that PLC output control signal gives actuator.

Embodiment the utility model is to realize like this, specify as follows in conjunction with Figure of description: injection boiler by body of heater (1), make-up pump (2), fuel pump (3), fan blower (4), burner (19), air door plate washer (33), etc. critical piece form, the saturated vapour of generation injects oil well.A kind of " intelligent injection boiler supervisory system ", it is to be core with PLC (10), touch-screen (11), printer (12), display (13), is connected with shielded cable with various measuring instruments (6,7,8,14,16,17,22,25,27) and various topworks (15,21,28,32), frequency converter (9,18,26).Realize online continuous automatic measurement steam quality and regulate the fire amount automatically to keep the steam quality of production requirement, this control loop is by steam quality gaging nozzle (5), pressure unit (6), differential pressure transmitter (7), discharge transmitter (8) is formed measure portion, its signal is connected with PLC (10) with shielded cable, measuring calculated with mathematical model through steam quality handles, drawing the mass dryness fraction value send touch-screen (11) to show, get the firing amount control signal through control algolithm and be connected with fire amount actuator (15) with umbilical cable, the automatic fire amount that changes is to reach the steam quality that keeps requirement.

But the utility model on-line continuous is carried out flue gas analysis automatically, and regulate air quantity automatically to keep best fuel-air ratio, this control loop is by flue gas analysis sensor (16), cigarette temperature measurement thermopair (17) is formed measure portion, its signal is connected with PLC (10) with shielded cable, carry out mathematics manipulation with on-line measurement thermal efficiency mathematical model, on touch-screen (11), can demonstrate oxygen content of smoke gas, carbon dioxide content, excess air coefficient, flue-gas temperature, the thermal efficiency, be connected for simultaneously the air output conditioning signal with frequency converter (18) with shielded cable, automatically change blower speed, promptly change the wind supply quantity of boiler, realize best fuel-air ratio, reach and improve the purpose that the thermal efficiency is saved the energy.

The utility model can be realized measuring automatically and the vapor pressure of controlling furnace fuel oil atomizing usefulness, this control loop is obtained the atomizing steam pressure measurement signal by atomizing steam pressure unit (22), be connected with PLC (10) with shielded cable, its deviation draws pressure adjustment signal and cuts down (21) with umbilical cable and atomizing pressure adjusting and be connected after control algolithm is handled, the vapor pressure that makes boiler export is through permanent reducing transformer (20) step-down 50%, cut down (21) the given pressure that reduces pressure through motorized adjustment again,, carry out fuel-oil atmozation and burn after (23) secondary decompression back is cut down in the self-operated type decompression is connected with burner (19).

The utility model is realized measuring automatically and control boiler water supply flow, this control loop is obtained water flow signal by water supply flow transmitter (8), be connected with PLC (10) with shielded cable, its deviation gets the water flow conditioning signal and is connected with frequency converter (9) with umbilical cable after control algolithm is handled, change water supply ram pump rotating speed, promptly regulate the boiler water supply flow automatically.

The utility model is realized measuring automatically and control furnace fuel oil pressure, this control loop is obtained the fuel pressure signal by fuel pressure transmitter (25), be connected with PLC (10) with shielded cable, its deviation draws the fuel pressure conditioning signal and is connected with frequency converter (26) with umbilical cable after control algolithm is handled, change the fuel pump rotating speed, promptly regulate furnace fuel oil pressure automatically, and fuel line is connected with burner (19), satisfies the needs of boiler combustion.

The utility model is realized measuring automatically and control furnace fuel oil temperature, this control loop is obtained the fuel oil temperature signal by fuel oil temperature transmitter (27), be connected with PLC (10) with shielded cable, its deviation draws the fuel oil temperature conditioning signal and cuts down (28) with umbilical cable and fuel oil temperature adjusting and be connected after control algolithm is handled, automatically change the steam flow of supplying with fuel heater (30), with the fuel oil temperature that keeps requiring.

Claims

A kind of " intelligent injection boiler supervisory system " that is used for the oilfield exploitation viscous crude, it is by the injection boiler body of heater, the water supply ram pump, fuel pump, fan blower, burner, air door plate washer critical piece is formed, with PLC, touch-screen, display, printer is core and steam quality gaging nozzle assembly, the flue gas analysis sensor, pressure, flow, the temperature detection transmitter, topworks is connected, it is characterized in that: steam quality gaging nozzle assembly is installed on the boiler export pipeline, pressure unit is installed on it, differential pressure transmitter, on the boiler inlet water pipeline discharge transmitter is installed, its differential pressure signal, pressure signal, water flow signal is connected with PLC, through mass dryness fraction mathematical-specific models treated, the online steam quality that records, PLC compares steam quality measured value and set-point, through the PID computing, the output control signal is connected with fire amount governor motion, regulates the fire amount automatically and keeps mass dryness fraction stable; The flue gas analysis detecting device is installed on the chimney, the oxygen electric potential signal that produces, cigarette temperature signal is connected with PLC, handle through thermal efficiency mathematical model, record flue gas oxygen content, excess air coefficient, PLC is by the PID computing, and the output control signal is connected with fan frequency converter, controls wind supply quantity automatically and keeps high thermal efficiency; Discharge transmitter, atomizing pressure transmitter, fuel pressure transmitter, fuel oil temperature transmitter are installed on boiler, its signal all is connected with PLC, after mathematical model is handled, drawing control signal cuts down and is connected with water supply ram pump frequency converter, atomizing pressure variable valve, fuel pump frequency converter, fuel oil temperature adjusting respectively, the water supply flow that automatically adjusts is regulated atomizing pressure automatically, regulates fuel pressure automatically, automatically regulate fuel oil temperature, guarantee the boiler even running.